Ternary Two-Cation Compounds Without Defects
Most of the compounds of this type have a lattice close to that of chalcopyrite CuFeS2, which is regarded as the typical representative of this group of ternary compounds, because iron in this compound is assumed to be trivalent. Semiconducting properties of natural chalcopyrite, particularly rectification at a point contact, were observed for the first time by Losev [112, 113]. More detailed information on the rectification at a point contact, as well as data on the transparency of chalcopyrite crystals at wavelengths longer than 2 µ, were reported in [83, 84]. Semiconducting properties of synthetic chalcopyrite were investigated first by Boltaks and Tarnovskii . Other workers  have established that the melting point of chalcopyrite is 950°C.
KeywordsSolid Solution Carrier Density Carrier Mobility Thermoelectric Property Thermoelectric Power
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